https://apnews.com/ab8bc538f4305a87af181493c8fe555a > CAPE CANAVERAL, Fla. (AP) — The U.S. military’s mystery space plane rocketed into orbit again Sunday, this time with an extra load of science experiments. > It’s the sixth flight of an X-37B, a solar-powered plane that's flown by remote control without a crew. Officials aren't saying how long the spacecraft will remain in orbit this time or the purpose of the mission.